[vsnet-campaign 1199] AM Cas: standstill-like activity?

[Taichi Kato <tkato>]

AM Cas: standstill-like activity?

  During the past one month, the outburst cycle length and amplitude have
decreased.  This behavior resemble the bahavior in some Z Cam stars just
before entering standstills.  Since the existence of standstills has not been
very clearly demonstrated in AM Cas, SS Cyg-type star with the shortest
outburst cycle length (cf. Kato et al. 2001, MNRAS in press), further
detailed observation to follow the consequence of the present behavior
is strongly encouraged.

  YYYYMMDD(UT)   mag  observer
  20010927.848  <142  (Eddy Muyllaert)
  20010930.156  <145  (Mike Simonsen)
  20010930.819  <135  (Jose Ripero)
  20011001.867  <135  (Jose Ripero)
  20011002.817  <133  (Maciej Reszelski)
  20011003.139  <142  (Mike Simonsen)
  20011003.898   131  (Eddy Muyllaert)
  20011004.815   132  (Eddy Muyllaert)
  20011004.969   135  (Maciej Reszelski)
  20011006.782   141  (Maciej Reszelski)
  20011006.937   141  (Eddy Muyllaert)
  20011006.994   143  (Mike Simonsen)
  20011007.894  <142  (Jose Ripero)
  20011008.856  <142  (Eddy Muyllaert)
  20011009.835  <142  (Eddy Muyllaert)
  20011009.906  <142  (Jose Ripero)
  20011010.801  <142  (Eddy Muyllaert)
  20011011.881  <142  (Eddy Muyllaert)
  20011013.974  <142  (Eddy Muyllaert)
  20011014.797   139  (Jose Ripero)
  20011015.883   133  (Jose Ripero)
  20011015.905   140  (Pavol A. Dubovsky)
  20011017.719   136  (Pavol A. Dubovsky)
  20011017.816   131  (Eddy Muyllaert)
  20011018.853   132  (Eddy Muyllaert)
  20011020.032   140  (Maciej Reszelski)
  20011020.919  <142  (Pavol A. Dubovsky)
  20011021.822  <142  (Eddy Muyllaert)
  20011023.810  <142  (Eddy Muyllaert)
  20011023.926  <142  (Jose Ripero)
  20011024.882  <142  (Eddy Muyllaert)
  20011024.910   139  (Jose Ripero)
  20011025.903   140  (Eddy Muyllaert)

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